On the value of nuclear and mitochondrial gene sequences for reconstructing the phylogeny of vanilloid orchids (Vanilloideae, Orchidaceae).

ABSTRACT:

Background and aims

Most molecular phylogenetic studies of Orchidaceae have relied heavily on DNA sequences from the plastid genome. Nuclear and mitochondrial loci have only been superficially examined for their systematic value. Since 40% of the genera within Vanilloideae are achlorophyllous mycoheterotrophs, this is an ideal group of orchids in which to evaluate non-plastid gene sequences.

Methods

Phylogenetic reconstructions for Vanilloideae were produced using independent and combined data from the nuclear 18S, 5.8S and 26S rDNA genes and the mitochondrial atpA gene and nad1b-c intron.

Key results

These new data indicate placements for genera such as Lecanorchis and Galeola, for which plastid gene sequences have been mostly unavailable. Nuclear and mitochondrial p

SUBMITTER: Cameron KM 

PROVIDER: S-EPMC2720648 | biostudies-literature | 2009 Aug

REPOSITORIES: biostudies-literature